上海充通大学 HCN World Shanghai Jiao Tong University H N NH, N DIAMINOMALEONITRILE POLYAMINOCYANOMETHYLENE NH2 NH NH2 BLACK HCN POLYMERS (AZULMIC ACID) diaminomaleonitrile Matthews,2004 NH2 aminomalononitrile POLYAMINOMALONONITRILE HETEROPOLYAMIDINESShanghai Jiao Tong University N N NH2 NH2 diaminomaleonitrile N N NH2 aminomalononitrile Matthews, 2004 HCN World